An Unusual Piceatannol Dimer from Rheum austral D. Don with Antioxidant ActivityReportar como inadecuado




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1

Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission & Ministry of Education, Yunnan University of Nationalities, Kunming 650031, China

2

Kunming Xianghao Technology Co., Ltd., Kunming 650204, China





*

Author to whom correspondence should be addressed.



Abstract A novel dimer of piceatannol glycoside, named rheumaustralin 1 was isolated from the underground parts of the ethnomedicinal plant Rheum austral Polygonaceae collected from Tibet together with 17 known compounds, including rheumin 2, 2,5-dimethyl-7-hydroxychromone 3, 2,5-dimethylchromone-7-O-β-d-glucopyranoside 4, 7-hydroxy-2-2-hydroxypropyl-5-methylchromone 5, torachrysone 6 torachrysone-8-O-β-d-glucopyranoside 7, 4-4-hydroxyphenyl-2-butanone-4-O-β-d-glucopyranoside 8, amabiloside 9, N-trans-feruloyl tyramine 10, chrysophanol 11, aloe-emodin 12, emodin 13, physcion 14, physcion-1-O-β-d-glucopyranoside 15, emodin-8-O-β-d-glucopyranoside 16, d-catechin 17 and gallic acid 18. Their structures were determined by combined spectroscopic methods and by comparison of their spectral data with those reported in literature. Compounds 1–10 were tested for their ability to scavenge 1, 1-diphenyl-2-picrylhydrazyl DPPH radical. View Full-Text

Keywords: Rheum austral D. Don; piceatannol dimer; rheumaustralin; DPPH radical Rheum austral D. Don; piceatannol dimer; rheumaustralin; DPPH radical





Autor: Lin Hu 1,2,* , Na-Na Chen 1, Qun Hu 2, Cui Yang 1, Qing-Song Yang 1 and Fang-Fang Wang 1

Fuente: http://mdpi.com/



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